Directions

Whisk the eggs and brown sugar together in a medium bowl until combined. Gradually add melted butter, buttermilk, lemon zest, lemon juice, and vanilla until well blended.

Fold into dry ingredients with rubber spatula (a few streaks of flour should remain). Remove blueberries from freezer and toss with remaining tablespoon of flour in small bowl. Gently fold berries into batter, being careful not to break the fruit.